1. Rounding off
(Outcome)

2. Math AB p. 24 Q5 (a) A number is 50 when rounded to the nearest ten
Math AB p. 24 Q5 (a) A number is 50 when rounded to the nearest ten. What could the number be? 70 80 90
What’s 10 less and 10 more than 50?
Or what’s 10 steps before and after 50?
45, 46, 47, 48, 49, 51, 52, 53 or 54
45 to 49 or 51 to 54

3. Math AB p. 24 Q5 (b) A number is 400 when rounded to the nearest ten
Math AB p. 24 Q5 (b) A number is 400 when rounded to the nearest ten. What could the number be?
390
400
410
What’s 10 less and 10 more than 400?
Or what’s 10 steps before and after 400?
395, 396, 397, 398, 399, 401, 402, 403 or 404
395 to 399 or 401 to 404.

4. Math AB p. 28 Q5 (a) A number is 300 when rounded to the nearest hundred. What could the number be?
200
300
400
What’s 100 less and 100 more than 300?
Or what’s 100 steps before and after 300?
250 to 299 or 301 to 349

5. Math AB p. 28 Q5 (b) A number is 1600 when rounded to the nearest hundred. What could the number be?
1500
1600
1700
What’s 100 less and 100 more than 1600?
Or what’s 100 steps before and after 1600?
1550 to 1599 or 1601 to 1649

6. Math AB p. 32 Q5 (a) A number is 6000 when rounded to the nearest thousand. What could the number be?
5000
6000
7000
What’s 1000 less and 1000 more than 6000?
Or what’s 1000 steps before and after 6000?
5500 to 5999 or 6001 to 6499

7. Math AB p. 32 Q5 (b) A number is when rounded to the nearest thousand. What could the number be?
18 000
19 000
20 000
What’s 1000 less and 1000 more than ?
Or what’s 1000 steps before and after ?
to or to